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10 items by relevance
1 PhD Thesis

Fast Plane Wave Imaging

Jensen, Jonas

Technical University of Denmark, Department of Electrical Engineering — 2017

This PhD project investigates and further develops methods for ultrasound plane wave imaging and blood flow estimation with the objective of overcoming some of the major limitations in conventional ultrasound systems, which are related to low frame rates and only estimation of velocities along

Year: 2017

Language: English

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2 Ahead of Print article · Journal article

Optimized Plane Wave Imaging for Fast and High-Quality Ultrasound Imaging

Jensen, Jonas; Stuart, Matthias Bo; Jensen, Jørgen Arendt

Ieee Transactions on Ultrasonics, Ferroelectrics and Frequency Control — 2016, Volume 63, Issue 11, pp. 1922-1934

This paper presents a method for optimizing parameters affecting the image quality in plane wave imaging. More specifically, the number of emissions and steering angles is optimized to attain the best images with the highest frame rate possible. The method is applied to a specific problem, where

Year: 2016

Language: English

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3 Conference paper

Plane wave fast color flow mode imaging: Parameter study

Bolic, Ibrahim; Udesen, Jesper; Gran, Fredrik; Jensen, Jørgen Arendt

Proceedings of Spie — 2006

A new Plane wave fast color flow imaging method (PWM) has been investigated, and performance evaluation of the PWM based on experimental measurements has been made. The results show that it is possible to obtain a CFM image using only 8 echo-pulse emissions for beam to flow angles between 45 degrees and 75 degrees. Compared to the conventional ultrasound imaging the frame rate is similar to 30 - 60 times higher. The bias, B-est of the velocity profile estimate, based on 8 pulse-echo emissions, is between 3.3% and 6.1% for beam to flow angles between 45 degrees and 75 degrees, and the standa...

Year: 2006

Language: English

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4 Conference paper

Fast color flow mode imaging using plane wave excitation and temporal encoding

Udesen, Jesper; Gran, Fredrik; Jensen, Jørgen Arendt

Proceedings of Spie Medical Imaging Meeting — 2005, pp. 427-436

velocity image is presented. The method is based on using a plane wave excitation with temporal encoding to compensate for the decreased SNR, resulting from the lack of focusing. The temporal encoding is done with a linear frequency modulated signal. To decrease lateral sidelobes, a Tukey window is used

Year: 2005

Language: English

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5 Journal article · Ahead of Print article

Fast Plane Wave 2-D Vector Flow Imaging Using Transverse Oscillation and Directional Beamforming

Jensen, Jonas; Villagómez Hoyos, Carlos Armando; Stuart, Matthias Bo; Ewertsen, Caroline; Nielsen, Michael Bachamnn; Jensen, Jørgen Arendt

Ieee Transactions on Ultrasonics, Ferroelectrics and Frequency Control — 2017, Volume 64, Issue 7, pp. 1050-1062

load, which is 4.6 times larger than for TO and seven times smaller than for conventional DB. Steered plane wave transmissions are employed for high frame rate imaging, and parabolic flow with a peak velocity of 0.5 m/s is simulated in straight vessels at beamto- flow angles from 45 to 90. The TO-DB

Year: 2017

Language: English

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